The thermoregulation heater circuit

Published:2011/6/28 20:55:00 Author:qqtang | Keyword: thermoregulation heater | From:SeekIC

The thermoregulation heater circuit is shown in the figure. It is divided into off , Lo AND HL 3 gears. When the converting switch is pulled from SA to Lo, the 220V mains is added on the two terminals of loading RL by VD4 and VD56; due to the half-wave rectification of the diode, the working voltage of RL is obviously lower than that when the 220v current is passable directly, so the temperature of RL is falling down.



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